Gage-glass protector.



P. G. DUNBAR.

GAGE GLASS PROTECTOR.

APPLICATION FILED wuss, 1912.

1,050,921- Patented Jan.21,1913.

% M FEW, 2

barren sra'rss Parana orraon.

FRANK G. DUNBAR, OF CHICAGO, ILLINOIS, ASSIGNOR T0 SARGENT COMPANY, OF

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

' GAGE-GLASS PROTECTOR.

Specification of Letters Patent.

PatentedJan. 21, 1913.

Application filed June 3, 1912. Serial No. 701,313.

tion.

My present invention relates to protective means and, more particularly,to protectors adapted for use in connection with locomo m tivegage-glasses and'aims to afford protection to -the,. "gage-glass fromexternal -under pressure from the protector, or, otherwise theglass-shield which permits observa- -tion of the gage-glass willbebroken by the forces and; also,- to shield the engineer andfire'n'ianfroiii the flying fragments of glass and the escaping hotwater and steam in the event of accidental breakage of the gage-glasswhen steam pressure is in the boiler. In order to effectually shield theengineer and fireman against flying fragments of .brokengage-glasses itis essential that the protector shall surround, not only the frontandsides of the gage-glass but, also, the ends-and back, for if the ends benot inclosed the flying glass particles will escape at these points andendanger the eyes of the engineer and fireman and, if the back he notinclosed the glass fragments will strike the end of the boiler and bedeflected and scattered throughout the cab.

While the complete inclosure of the gagelass to prevent broken particlesof glass Jrom escaping is of primeimportance, an-

other factor must be considered in the construction of a protector, viz:that the steam u the boiler is under a pressure appi:oxi-' mating twohundred pounds and, when the gage-glass breaks, some provision must bemade for the escape of the steam and water enormous pressure fromwithin, thereby increasing rather than obviating the dangers froinflying particles of broken glass.

. My present invention has for one of its objects the provision of agage-glass protector which will effectually prevent flying particles ofa broken gage-glass from scattering throughout the cab and, at the sametime, will permit the escape of steam and water from the protector sothat the glass .shield will not be broken.

Another object is to provide novel and improved means for holding theshield in position in such a way that it will not be readily fracturedby pressure from within and will also be rigidly held in positionthereby obviating the dangers of fracture by jiggling and jarring about.7

The invention and its attendant advantages will be understood from thefollowingdescription when consideredin connection with the accompanyingdrawings illustrating one preferred embodiment thereof.

Referring to the drawings l igure 1 is a longitudinal sectional view ofa protector embodying my invention; Fig. 2 is a transverse sectionalview on the line 2--2 of Fig.

1; and Fig. 3 is a similar view on line 3-3 of Fig. 1.

port for the-gage glass to prevent breakage v of the same and is alsoconstructedfto hold ,a gage-glass shield around the gage-glassv forprotective purposes. The gage-glass 7. of usual/ construction and anydesired length, has. its lower end connected with the gage cock 5 in theusual manner.

The holder, designated generally by ref? er ence character 8, is,preferably, for cheap- -ness in manufacture, cast integrally, in onepiece. of iron, aluminum, or other material, alum num being well adaptedfor the purpose on account of its lightness.

y The rear wall of the holder is curved outwardly at 9 preferablythroughout its length to form a longitudinally extending passageway 11,opened at its rear side to permit the escape of steam and water underpressure. Between the curved portions!) and preferably formedintegrally, with the holder there is disposed a curved battle-plate 12reinforced at the sides intermediate its ends by short webs 13. At theupper and lower ends the holder is equipped with forwardly projectingflanges 14 and 15, respectively, and flange 14 is projected rearwardly'as inand the side flanges are still further dicated at 16 to close thetop of the passageway 11 while the lower end is left open to permit theparticles of a broken gagegl'ass to drop upon the deck of the cab. Atthe sides of the body are formed forwardly projecting flanges 17 and 18,spaced to receive between them the rearwardly projecting edges of acurved wire glass-shield 19 of well known construction. Adjacent theirends where the side flanges l7 and 18,con-- nect with the top and bottomof flanges 14 separated throughout a portion of their length indicatedby 21 and 22 to form recesses on each side of the shield adjacent itsends for the reception of the ends of curved holding clips 23 and 2t.Theseclips are adapted to fit over the ends of the shield and areprovided, respectively, with flanges 25 and 26 which embrace the outerface of the shield at its ends to hold it in position. The clips areheld together to clamp the ends of the shield therebetween by a-pair ofrods 27 and 28 threaded at each end into the clips and, for the purposeof preventing the shield from jarring about within the clips, a suitablepacking or composition 29 may be interposed between the clips and theend of the shield, if desired.

The end flanges 1-1 and 15 are equipped with threaded studs 31 and 32,respectively, adapted for connection with the flexible tube 33 and thegage cock 5 by means of any suitable connecting nuts. For the purpose ofholding the shield and clips in position, the flanges 14 and 15 and,also, the clips 23 and 24- are provided with alined perforations throughwhich a retaining rod 34 is inserted. It will be obvious that, byemploying the clips which embrace the shield at its ends and thensecuring the clips to the body of the holder, the shield is securelysupport-ed against lateral displacement entirely around its peripheryat. both the top and bottom and is, therefore, much less liable tofracture under internal pressure than if the clips were omitted and itwere held in place merely by the rod 34. The inner edges of the shieldare also held against outward movement by the lateral flanges 17 and 18.

When the gage-glass 7 becomes accidentally broken the flying particlesof glass will be prevented from scattering sidewise and forwardly by theshield 19 and their rearward escape will be obstructed by thebaflie-plate 12. The steam and water will escape around the baffle-plateand relieve the shield of internal pressure while the glass particleswill be obstructed by the plate and deflected by the curved walls 9 sothat their projectile force will be greatly diminished. A screen 35 issecured over the rear opening betweenthe curved walls 9 to prevent suchglass particles as escape around the battle plate from being dischargedagainst the from the foregoing without further description and, it willbe obvious, that the details of construction may be varied withinconsiderable limits without departure from the scope of the invention.

I claim:

1. A gage-glass protector comprising an elongated body provided withoutstanding flanges, the rear wall of said body being open to permittheescape of steam and water under pressure, iinperforate means forobstructing the escape of glass particles through the opening in theback of the body, and a transparent imperforate shield across the frontof the body and between the flanges.

2. A gage-glass protector comprising an elongated body and a transparentshield mounted thereon, the rear wall of said body being open to permitthe escape of steam and water under pressure and having a 1011- bodybeing extended outwardly and provided with an elongated opening topermit the escape of steam and water under pres sure, and a curvedbaflie-plate disposed in front of said opening to receive the impact offlying particles of glass and obstruct their escape.

4. A gage-glass protector comprising a body, a transparent gage-glassshield mounted on its forward face, the rear wall of said body beingextended outwardly and provided with an elongated opening to permit theescape of steam and water under pressure, a curved baflle-plate disposedin front of said opening to receive the impact of flying particles ofglass and obstruct their escape, and a screen positioned over saidopenmg.

5.1%. gage-glass protector comprising an integral body provided atitsends with flangesapertured to receive the ends of a gage-glass, the rearwall of the body being extended outwardly and provided with a centrallydisposed longitudinally extending opening, and a baflleplate formedintegrally with the body ahd disposed between the nornal position of thegage-glass and said opening to obstruct the escape of broken glassparticles.-

6. In a gage-glass protector, the combinatiofi=of a body providedwith'top and bottom forwardly projecting end flanges, a glass shielddisposed between said flanges, a pair of clips embracing the shieldadjacent its ends, and retaining means engaging said flanges and saidclips whereby the shield is held at the top and bottom againstdisplacement.

'Z. In a gage-glass protector, the combination of an inflexible bodyadapted for attachment at its ends to connections with a boiler, therear wall of said body being ex: tended outwardly and a bafli-platebeing positioned in front of said feXtended portion, a curved glassshield disposed around the gage-glass in front of the rear wall of thebody, a pair of clips embracing the shield near its ends, and retainingmeans connecting the cli ps with the body whereby to hold the shield inposition.

8. In a gage-glass protector, the combination of an inflexible bodyprovided with end flanges adapted forattachment to connections with aboiler, and longitudinal side flanges, a curved shield positioned to beembraced by said end and side flanges, a pair of curved holding clipsembracing the shield adjacent its ends and disposed between the 'steamand water under pressure, a baflieplate formed integrally with the bodybeing disposed in front of said opening to obstruct the escape of brokenparticles of a gage-glass, a curved shield disposed between saidperipheral flanges, a pair of curved clips embracing the ends of theshield, and means for connecting the clips with the body whereby toretain the shield in position.

10. A gage-glass protector comprising an inflexible body adapted forattachment at its ends to connections with a boiler and having anopening in its rear wall, a screen positioned over said opening abaffle-plate dispoesd, in front of said opening to intercept flyingparticles of glass, and a shield carried by the body.

FRANK G. DUNBAR.

Witnesses IRA J. WILSON, M. A. Knmm.

